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Aerial photo taken on April 30, 2018 shows the dismantling site of a chemical factory along the Yangtze River in Yichang City, central China's Hubei Province. (Xinhua/Xiao Yijiu)

Aerial photo taken on April 30, 2018 shows the dismantling site of a chemical factory along the Yangtze River in Yichang City, central China's Hubei Province. (Xinhua/Xiao Yijiu)